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天宫空间站拭子发现未知菌种

2025-05-21 20:24 by 天渊

中国天宫空间站拭子样本发现未知菌种,其特性可能有助于适应太空的极端环境。神舟太空生物科技集团和北京航天器系统工程研究所的研究人员将该细菌以天宫命名为天宫尼尔菌(Niallia tiangongensis)。相关拭子是神舟十五号宇航员于 2023 年 5 月从空间站内收集的,该研究旨在调查居住环境的微生物组。天宫尼尔菌被认为可能与杆状土壤细菌环状尼尔菌(Niallia circulans)有近亲关系。环状尼尔菌及其太空近亲能将生命活性物质封装在坚固孢子中以抵御极端压力。目前尚不清楚天宫尼尔菌是在空间站演化形成,还是以孢子形态抵达空间站时已具备部分特征。基因分析显示,该菌种具有分解明胶获取氮碳元素的独特能力,这种特性有助于其在恶劣环境下构建生物膜保护层。

www.sciencealert.com/unknown-species-of-bacteria-discovered-in-chinas-space-station
www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.006693

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天宫空间站拭子发现未知菌种

2025-05-21 20:24 by 天渊

中国天宫空间站拭子样本发现未知菌种,其特性可能有助于适应太空的极端环境。神舟太空生物科技集团和北京航天器系统工程研究所的研究人员将该细菌以天宫命名为天宫尼尔菌(Niallia tiangongensis)。相关拭子是神舟十五号宇航员于 2023 年 5 月从空间站内收集的,该研究旨在调查居住环境的微生物组。天宫尼尔菌被认为可能与杆状土壤细菌环状尼尔菌(Niallia circulans)有近亲关系。环状尼尔菌及其太空近亲能将生命活性物质封装在坚固孢子中以抵御极端压力。目前尚不清楚天宫尼尔菌是在空间站演化形成,还是以孢子形态抵达空间站时已具备部分特征。基因分析显示,该菌种具有分解明胶获取氮碳元素的独特能力,这种特性有助于其在恶劣环境下构建生物膜保护层。

www.sciencealert.com/unknown-species-of-bacteria-discovered-in-chinas-space-station
www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.006693

#太空

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Should You Buy Bitcoin?

In general, many financial experts support their clients’ desire to buy cryptocurrency, but they don’t recommend it unless clients express interest. “The biggest concern for us is if someone wants to invest in crypto and the investment they choose doesn’t do well, and then all of a sudden they can’t send their kids to college,” says Ian Harvey, a certified financial planner (CFP) in New York City. “Then it wasn’t worth the risk.” The speculative nature of cryptocurrency leads some planners to recommend it for clients’ “side” investments. “Some call it a Vegas account,” says Scott Hammel, a CFP in Dallas. “Let’s keep this away from our real long-term perspective, make sure it doesn’t become too large a portion of your portfolio.” In a very real sense, Bitcoin is like a single stock, and advisors wouldn’t recommend putting a sizable part of your portfolio into any one company. At most, planners suggest putting no more than 1% to 10% into Bitcoin if you’re passionate about it. “If it was one stock, you would never allocate any significant portion of your portfolio to it,” Hammel says.

How Does Bitcoin Mining Work?

Bitcoin mining is the process of adding new transactions to the Bitcoin blockchain. It’s a tough job. People who choose to mine Bitcoin use a process called proof of work, deploying computers in a race to solve mathematical puzzles that verify transactions.To entice miners to keep racing to solve the puzzles and support the overall system, the Bitcoin code rewards miners with new Bitcoins. “This is how new coins are created” and new transactions are added to the blockchain, says Okoro.

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